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Finding the Fourth Proportional to 19,860.71, 27,410.13 and 11,907.32

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Solution

The fourth proportional to 19,860.71, 27,410.13 and 11,907.32 is: 16,433.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,860.71 : 27,410.13 = 11,907.32 : x
  2. Step 2: Convert to fraction form
    19,860.71/27,410.13 = 11,907.32/x
  3. Step 3: Cross multiply
    19,860.71x = 27,410.13 × 11,907.32
  4. Step 4: Simplify right side
    19,860.71x = 326,381,052.10
  5. Step 5: Solve for x
    x = 326,381,052.10/19,860.71
  6. Step 6: Final answer
    x = 16,433.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.